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1、l4廣東農(nóng)業(yè)科學(xué)2014年第2期酚酸對(duì)煙苗根系生長(zhǎng)及葉片光合特性的影響王茂勝,李明。,楊秀祥,汪漢成!,邱忠智,蔣選利(1.貴州大學(xué)農(nóng)學(xué)院,貴州貴陽(yáng)550025:2.貴州省煙草科學(xué)研究院/煙草行業(yè)煙草分子遺傳重點(diǎn)實(shí)驗(yàn)室,貴州貴陽(yáng)550081:3.中國(guó)煙草公司貴州省公司,貴』I'1貴陽(yáng)550004;4.貴州省興義市煙草公司,貴州興義562400)摘要:為了解酚酸類(lèi)他感物質(zhì)對(duì)煙苗生長(zhǎng)發(fā)育的影響,研究了苯甲酸、對(duì)羥基苯甲酸和水楊酸對(duì)煙苗根系發(fā)育、氣體交換特征、葉綠素?zé)晒鈪?shù)及葉綠素含量的影響。結(jié)果表明,3種酚酸隨著濃度的增加,煙苗葉片葉綠素含量(SPAD值)均呈先
2、增加后降低趨勢(shì);3種酚酸能夠顯著抑制煙苗根系發(fā)育,隨著濃度增加,根尖數(shù)、總根長(zhǎng)和總根表面積呈先升后降或直接降低的趨勢(shì);3種酚酸能夠降低凈光合速率(Pn),苯甲酸差異不顯著;3種酚酸對(duì)葉綠素?zé)晒鈪?shù)均有影響,隨著濃度的增加,F(xiàn)v/Fm有降低趨勢(shì),但差異不顯著,qP和~PSII呈顯著下降趨勢(shì).NPQ呈顯著升高趨勢(shì)。本試驗(yàn)證明了3種酚酸對(duì)煙苗根系發(fā)育、光合作用有抑制作用關(guān)鍵詞:烤煙;根系提取物;自毒作用;化感作用;酚酸中圖分類(lèi)號(hào):$572文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1004—874X(2014)02—0014—05Efectofphenolicacidontheroo
3、tgrowthandphotosyntheticcharacteristicsoftobaccoseedlingWANGMao—sheng,LIMing,YANGXiu-xiang,WANGHan—eheng,QIUZhong~zhi.JIANGXuan—li(1.AgriculturalCollegeofGuizhouUniversity,Guiyang550025,China;2.GuizhouTobaccoResearchlnstitute/KeyLaboratoryofMolecularGenetics.GuizhouAcademyofTobacco
4、Science,Guiyang550081,China;3.ChinaTobaccoCorporationGuizhouCompany,Guiyang550004.CnⅡ:4.XingyiTobaccoMonopolyBureau,Xingyi562400,China)Abstract:Inordertoinvestigatetheinfluenceofphenolicallelochemicalsonthegrowthanddevelopmentoftobaccoseedlings,effectofbenzoicacid,p-hydroxybenzoica
5、cidandsalicylicacidonseedlingrootgrowth,characteristiesofgasexchange,chlorophyllfluorescenceparametersandchlorophyllcontentoftobaccowereanalyzedinthisstudy.ResultshowedthatchlorophyllcontentofseedlingleaffSPADvalue1firstincreasedandthendecreasedwiththeenhanceHientofthethreephenolic
6、acids;Threephenolicacidsallsignificantlyinhibitedthegrowthoftobaccoseedlingroot,suchastipnumber,totalrootlengthandtotalrootsurfaceareawhichshowedthetrendoffirstincreasedandthendecreasedordecreaseddirectly;threephenolicacidsalldecreasedthenetphotosyntheticrate(Pn),therewasnosignific
7、antdifferenceinthetreatmentofbenzoicacid;threephenolicacidsal1hadeffeetonchlorophyllfluorescenceparameters.theFv/Fmvaluedecreasedwiththeincreasingofconcentrations,whilewithnosignificantdiference,qPandPSIIvaluessignificantlydecreased.Ourstudyexhibitedthatallthreephenolicacidsinhibit
8、edthedevelopingoftobaccose